Land-use inventories and household travel surveys, which are often used to collect socio-economic and traffic data for urban transportation planning models, are costly and time-consuming. The required time and cost can be reduced by using an aggregated Traffic Analysis Zone TAZ structure and network model since they are closely related to detail of the TAZ structure and network model. However, it is important to determine the aggregation levels, depending on the purpose and subject of the research, because the use of the aggregated data could lead to aggregation bias. The main of this paper is to analyze the spatial aggregation level effects of TAZ structures and network models on traffic assignment results using an urban transportation planning model based on data from Seoul City. The second objective is to propose two new aggregation levels for the planning assessments of higher-class roads. Several evaluation indices are available for analyzing the aggregation effects of TAZ structures and network models and for investigating the proposed aggregation levels.
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Urban Transportation & Construction
Scientific Research An Academic Publisher. Transportation problem is famous in operation research for its wide application in real life. This is a special kind of the network optimization problems in which goods are transported from a set of sources to a set of destinations subject to the supply and demand of the source and destination, respectively, such that the total cost of transportation is minimized. The basic transportation problem was originally developed by Hitchcock in .
American Transportation Policy and Urban Development (Research Paper Sample)
The first decade of the Twenty-First Century has seen dramatic shifts in our global urbanized environments and cities. Developed countries have experienced rapid urbanization around their edges and deindustrialization in their cores, which are challenging historical models of city form and function. In the United States alone there is a record amount of blighted and vacant land surface available in urbanized areas that needs to be reimagined and retrofitted for productive uses. A renaissance of environmental thinking is creating demand for new urbanization models based on systems that are more energy efficient, digitally connected, culturally relevant, and ecologically sustainable. Unprecedented stress is also being put on the built fabric of existing cities due to forces such as climate change, migration, social reformation, and technological advancement.
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